Actually, from what we know now, the problem existed in U2 as well. Installing the update simply prompted the customers to open UI (which many don't do too often) and face significantly large number of backups, sessions etc. than the last time (by the way, the issue is limited to large infrastructures only).

Anyway, the issue is all about sub-optimal SQL queries, so was an easy fix and we already have the patch in testing.

Allthough we have a very small environment (2 hosts, 10 VMs) I can observe a lag when clicking on agent policy (category backup), but in our case console will only freeze for 5 sec. so not that bad as other users have experienced. But I think it shows that the issue could be quiete widespread so maybe another update would makes sense.